Abstract：Objective: To explore the relationship between the uncommon CT findings of renal clear cell carcinoma with pathology and to evaluate it’s clinical value. Materials and Methods: Seventeen cases with renal clear cell carcinoma confirmed by surgical pathology underwent spiral CT plain scanning and dynamic enhancement scanning before operation, the CT data were reviewed and analysed retrospectively in comparison with surgical and pathological results. Results: Twenty renal lesions and 3 lesions outside of kidney were revealed in these 17 patients. Lesions located in the right kidney(n=13) and in the left kidney(n=7). The center of lesions located in the cortex of kidney(n=14) and between the medulla and the cortex of kidney(n=6). The lesions appeared as round or ellipse in shape with the mean diameter of 4.7cm(range 1.7 to 8.3cm). The CT value of the plain scan, corticomedullary phase and nephrographic phase were 11.4~34.0HU(with a mean value of 20.9HU), 27.3~112.5HU(with a mean value of 48.2HU) and 36.4~77.4HU(with a mean value of 53.7HU) respectively. The margin and the necrosis of tumor were well showed in nephrographic phase. Two adrenal pheochromocytomas and 1 islet cell tumor in the pancreatic tail were revealed outside of kidney. Conclusion: The uncommon CT findings include: insufficient blood supply, cystic, sarcomatous change and bilateral multiple renal lesions. The CT findings are correlated with histologic type, cell differentiation, vascularization and biological behaviour. Recognization the uncommon CT findings is helpful to improve the accuracy of diagnosis and pathological typing.
2009, Vol. 20 
